Depends on budget...if u don't know what's good, buy what's more expensive...

first choice SONY,
then HP and IBM,
then the rest...

I'm using an HP 24/7 for more than two years now(didn't have enough for a SONY at that time :D), and had never any problems...but, I have heard that people really had problems with overheating and display failure, and that the "customer support" isn't really HP's thing :)...

so good luck,

dElA